diff options
| author | bors <bors@rust-lang.org> | 2014-07-22 10:46:16 +0000 |
|---|---|---|
| committer | bors <bors@rust-lang.org> | 2014-07-22 10:46:16 +0000 |
| commit | bfcde309e7748dfdf33418c2a1e6c6bdfbdcc8e2 (patch) | |
| tree | b28fdbafa95391edfa1a2f358e79e8ec5bbb620a /src/rustllvm/PassWrapper.cpp | |
| parent | 62f1bb047bdbb02b08e4e50a9716af2da6799241 (diff) | |
| parent | c61f9763e2e03afbe62445877ceb3ed15e22e123 (diff) | |
| download | rust-bfcde309e7748dfdf33418c2a1e6c6bdfbdcc8e2.tar.gz rust-bfcde309e7748dfdf33418c2a1e6c6bdfbdcc8e2.zip | |
auto merge of #15876 : brson/rust/failfat, r=pcwalton
Adds a new runtime unwinding function that encapsulates the printing of the words "explicit failure" when `fail!()` is called w/o arguments.
The before/after optimized assembly:
```
leaq "str\"str\"(1412)"(%rip), %rax
movq %rax, 24(%rsp)
movq $16, 32(%rsp)
leaq "str\"str\"(1413)"(%rip), %rax
movq %rax, 8(%rsp)
movq $19, 16(%rsp)
leaq 24(%rsp), %rdi
leaq 8(%rsp), %rsi
movl $11, %edx
callq _ZN6unwind12begin_unwind21h15836560661922107792E
```
```
leaq "str\"str\"(1369)"(%rip), %rax
movq %rax, 8(%rsp)
movq $19, 16(%rsp)
leaq 8(%rsp), %rdi
movl $11, %esi
callq _ZN6unwind31begin_unwind_no_time_to_explain20hd1c720cdde6a116480dE@PLT
```
Before/after filesizes:
rwxrwxr-x 1 brian brian 21479503 Jul 20 22:09 stage2-old/lib/librustc-4e7c5e5c.so
rwxrwxr-x 1 brian brian 21475415 Jul 20 22:30 x86_64-unknown-linux-gnu/stage2/lib/librustc-4e7c5e5c.so
This is the lowest-hanging fruit in the fail-bloat wars. Further fixes are going to require harder tradeoffs.
r? @pcwalton
Diffstat (limited to 'src/rustllvm/PassWrapper.cpp')
0 files changed, 0 insertions, 0 deletions